Brian Crower Valve Guides – 6.6mm Mitsubishi 4G63/Evo Exhaust (Quantity of 8)

SKU: BC3911

Brian Crower Valve Guides 6.6mm Mitsubishi 4G63 Evo Exhaust 1990-2006 (Set of 8)

Brian Crower BC3911 valve guides feature a 6.6mm inner diameter designed specifically for exhaust valves in Mitsubishi 4G63 engines. These guides fit a range of DSM and Evo models including Eclipse GST GSX Talon and Lancer Evolution for reliable valve stem alignment during high revving conditions. The set of 8 provides complete coverage for the exhaust side delivering consistent performance and reduced wear in tuned motors.

Key Features

• Manganese Bronze Material: Handles high exhaust temperatures with effective heat dissipation and resistance to galling for longer head life
• 6.6mm Inner Diameter: Matches OEM Evo 4G63 exhaust valve specs for exact stem clearance and minimal side loading
• Set of 8 Guides: Covers all exhaust ports on DOHC 4G63 heads simplifying full rebuilds
• Precision Machined Tolerances: Ensures smooth valve action and seals properly with stock or aftermarket seats
• Performance Engineered: Developed for turbocharged 4G63 applications supporting 500+ whp levels

Product Notes

• Intended for exhaust valves only pair with BC3910 intake guides for complete sets
• Inspect valve seats during installation for proper contact and interference
• Packaged securely lightweight at 0.25 lbs fits easily in standard shipping

Installation Notes

• Professional installation recommended.
• Requires valve guide puller and driver tool for press fit removal and insertion
• Compatible with multi-angle valve seats verify head condition before assembly

This Part Fits

Year	Make	Model	Submodel
1990-1998	Eagle	Talon	TSi
1990-1994	Mitsubishi	Eclipse	GS
1990-1999	Mitsubishi	Eclipse	GST
1990-1999	Mitsubishi	Eclipse	GSX
1996-1999	Mitsubishi	Eclipse	Spyder GST
1991-1992	Mitsubishi	Galant	VR-4
2003-2006	Mitsubishi	Lancer	Evolution
2005-2006	Mitsubishi	Lancer	Evolution MR
2005-2006	Mitsubishi	Lancer	Evolution RS
2006	Mitsubishi	Lancer	Evolution SE
1990-1994	Plymouth	Laser	RS

Why Choose Brian Crower?

• Engineered for motorsport use in drag road race and rally 4G63 builds
• Consistent quality from CNC machining and material selection
• Backed by decades of experience in Japanese performance components

Frequently Asked Questions

• Q: Will BC3911 fit Evo 8 and 9 models?
  A: Yes fits 2003-2006 Mitsubishi Lancer Evolution including MR RS and SE with 4G63 engines
• Q: What material are these valve guides made from?
  A: Manganese bronze for optimal thermal conductivity and durability under boost
• Q: Is there a warranty on Brian Crower valve guides?
  A: Covered under Brian Crower limited lifetime warranty against manufacturing defects

Shipping & Handling

• Method: UPS Ground or USPS Priority
• Availability: In stock – ships same or next business day
• Packaging: Compact box 4 x 4 x 2 inches
• Weight: 0.25 lbs